Hello Hari,
I am not sure about, which exam have you giben for which your marks are 181. But I am assuming that you have given TNEA as you are enquiring for MIT, Chennai.
I am sorry to tell you that your score will not make you eligible for admission into MIT, as the cut offs are bit high. You can always try for some other institutes.
Hope this helps, Thank you
All the best
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile